The video of the incident, which was first uploaded by Miqdaad Versi, assistant secretary general at the Muslim Council of Britain, begins with a bald white man approaching a man and woman as the train slows to a halt.

Suddenly, he punches the Asian man on the side of the face and flees as the gates open and the woman is seeing chasing after the assailant.

Its painful to watch as you hear the loud thud as the force of the strike causes the Asian man’s head to hit the window behind him and he is seen clutching his face in pain.

Speaking to the Daily Star, a law enforcement official said, “A 33-year-old man has been arrested on suspicion of assault occasioning ABH [actual bodily harm] and using threatening / abusive words / behavior or disorderly behavior likely to cause harassment, alarm or distress.”

Racist attacks and hate crimes have risen significantly since the days leading up to and following the EU Referendum — more commonly known as Brexit.

According to a report by The Guardian the rise in hate crimes in the UK is the worst on record following the referendum.

The Brexit debate deepened already existing fault lines between immigrants and locals in England and has fostered a creeping form of xenophobia and nationalism that is spreading around the world.

And while attacks like these are shocking and horrifying to see, we can can take some comfort in how the heroic woman sprung to action and and sprinted down the platform after him.